"Year","CPI(t)","CPI(t-1)"
1981,10.4,13.5
1982,6.1,10.4
1983,3.2,6.1
1984,4.3,3.2
1985,3.6,4.3
1986,1.9,3.6
1987,3.6,1.9
1988,4.1,3.6
1989,4.8,4.1
1990,5.4,4.8
1991,4.2,5.4
1992,3,4.2
1993,3,3
1994,2.6,3
1995,2.8,2.6
1996,3,2.8
1997,2.3,3
1998,1.6,2.3
1999,2.2,1.6